Sheet-metal sash-pulley.



g No. 840,389. PATENTED JAN. 1, 1907.

' F.E.SLOA N'.

SHEET METAL SASH PULLEY.

APPLICATION FILED APB..13. 1906.

: I noentoz mommy 'JWHMMQQ @220 IUNII D A FaANcIs. UGE SLOAN, or BALTIMORE-MARYLAND, "sHE Er-MeTALsAsHepuLizv, I

To ail whom it may concern:

Be it known that I, FRANCIS EUGENE,

SLOAN, a citizen of the United States, resid "ing at Baltimore, inthe State of Maryland,

have invented certam new and useful Improvements in Sheet Metal Sash-Pulleys, of b which the following is a specification.

This invention relates to improvements in grooved sash-pulleys, and has for its object to provide a sheet-metal pulley of such con struction that the side plates will be held together by a tire of improvedconstruction.

he invention is illustratedin-the accompanying drawings, which- Figure 1 illustrates a side elevation of the ullev. Fi 2 .shows'a central cross-section v g of the same. Fig. 3 illustrates a side elevation of the inner side of one ofthe side plates' Fig. 4 shows a detail view of the tire, and Fig. 5 illustrates a fragmentary perspective view of a portion of the tire and one side plate secured together.

Referring to the drawings by numerals, 1

designates the two side plates, which form the pulley proper and which are to be secured together by an improved construction of tire or band 2, so that the working face of the pulley will form a smooth concave channel for the flexible connection b'etweenthe weight and sash to travel over.

Each side platel is stamped from a blank I of stiff sheet metal and is gii'ovided with a central tubular bearing 3, w ch projects inwardly from an outwardly bulged or curved central portion 4. .Beyond the central curved portion the plates are provided with an inwardly-curved surface 5, and the flanges 6 of the plates extend laterally from said curved surface. The lateral flange of each side plate is provided with an outer circumferential rim edge 7 and an inner circumferential recessS,

with a wall or shoulder 9 between the two. When the two side plates are fitted together, the inwardly-projecting tubular bearings 3 will confront each other, while the inwardlycurved surfaces 5 will contact, and the flanges 6 will project laterally in opposite directions. If the two side plates were merely placed together as just described and then riveted, an annular V-shaped space 10 would extend circumferentially around the fl Specification of 'Letters Patent. v j Applicationfilediipril13,1906. Seria1No-31L452.

V 5 Patented .maJ'i, 19,07.

pulley and the 1pull on the sash-cord would tendto spread t e plates apart and by, entering or squeezingint-o sald annular space.

One 0 ject of my invention is to remove this objectionable feature by providing a tire or and which not onlry serves to bridge over the crack, but whic will also serve tohold the two side plates together.. The tire 2'is provided with a channel 12, and its 0 posite sidepates. I j a The tire mayhave split. or overlapping ends 14, so that its joint may not extend dinally across said channel; but it is to be understood that the invention-is not limited in this respect.

, When the tire is in position arovnd the the circum PATENT OFFIQE Y concave surface will become flush with the upper surface of the rim edge 7, anduthe cir-' 0 rovided with a 'luralthus clenched on the outer side of the flanges,

the two side ]plates will be securely held together and t e concave portion of the tire will cover the annular V-shaped space 10,

which passes around the tire, will serve to draw the two side. plates together instead of pressing them apart.

Having thus described my inventiofii iivhat I claim as new, and desire to. secure by ters Patent,'is v 1. In a pulley, .the combination with the side plates having laterally-projectin circumferential flanges which are provide with and the downward pull of the cord or chain,

a dplurality of slots, of a circumferential tire I a J acent said flanges and being of less width than the latter and having a plurality of anges.

tangs which project through the slots of said.

60 run edgesare provided "with lat-era y-pro- 1 ,jecting tangs 13, byrwhich it isto engage the 6 rectlyacross the concave channeLbut diagoa lateralflaniges of the side plates, it will lie in erential recess 8., so that its outer 2. In a ull'ey, the combination 'With the are turned against the outer side of said side plates awinglaterailly-projectin flanges flanges. 1Q which are provided with a circu erential I In testimony whereof I affix my signature recess and-havinga pluralityof slots around .iii-preeenceoftwo witnesses.

' 5 said recess, of a; tire of less width than the j FRANCIS EUGENE SLOAN.

Witnesses: v 1 CHARL sB-MA N, Jrf, PARKER S.- BURB4NK.

flanges and extendingacross the latter between the slots, said tire having a plurality of-tangs which project through said slots and 

